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#1 |
Registered User
Join Date: May 2017
Location: Dallas, TX
Posts: 8
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Clutch pedal to transmission linkage bracket question
Hello group. I need help locating the proper engine side bracket that allows the pedal to throw out bearing arm linkage to pivot. I have an original 67 gmc that came with a 305 v6 and 4 speed. I replaced the 305 with a 250 about 10 years ago and was able to make a bracket that attached to the side of the 250 block. I'm in the process of replacing the 250 with a 292 and noticed that attachment point is not on the 292 block. Is there a bracket part number for my application or do I need an entirely new linkage? Thanks in advance.
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#2 |
Registered User
![]() Join Date: Feb 2010
Location: Fort Atkinson, WI
Posts: 39
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Re: Clutch pedal to transmission linkage bracket question
Hi there, I just finished with the same issue with a 400 SBC. I started with this: https://www.summitracing.com/parts/n...81shoCSTjw_wcB
And then had to lengthen the tabs to get it in-line with frame bracket. My Z-rod had to be cut/shortened in middle to accommodate the bracket not being attached to the block. It worked good in mock-up, now painted waiting to go back in. Hope this helps.
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DaddyBooz ![]() '68 C10 LWB KCP 406; 400 small block, 30 over, alum heads built by Kurt Clapper Ceramic center dumps, custom 2 1/2" SS all the way back w/MagnaFlows 2"/4" drop on 15's |
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#3 |
Senior Member
![]() Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,255
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Re: Clutch pedal to transmission linkage bracket question
What year is your 292 block? I'm not very familiar with 250s. I thought the L6s were all the same. I've had no trouble switching between 292 blocks, but my years were close. [Consecutive actually '68, '67]http://www.PetHarbor.com/WebForm_ConfirmRequest.aspx?req_id=1715500
I'll try to get a pic of the separate Z-Bar ball stud bracket. I have one loose somewhere. My good digital cam went back to Sony for R & R. So we'll have to make do with cellphone pix. That's a nice part from Summit, but it's for a V8 SBC. Wouldn't work on an L6 without a lot of unnecessary fabrication. Just get the right part. And here's the right 292 stuff. [I'd stay well away from Hydrolic clutches. They leak, go out of adjustment and have to be fidgeted with at all hours.Spendy, too.]
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Every 25 years I like to rebuild that 292, whether it needs it or not. Last edited by '68OrangeSunshine; 05-31-2017 at 05:01 PM. Reason: more pix |
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#4 |
Registered User
Join Date: Aug 2016
Location: Lake Forest, CA
Posts: 2,177
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Re: Clutch pedal to transmission linkage bracket question
Im going with this combo
https://www.novak-adapt.com/catalog/...-hcr3/kit-hcrc http://transmission.moderndriveline....egory=26&VS7=0
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"Work hard, use your vacation days." 1970 C15 GMC Long Bed 1986 C20 Scottsdale 1983 K2500 Sierra Classic Suburban 6.2 Instagram: C10sofOC |
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#5 |
Registered User
Join Date: May 2017
Location: Dallas, TX
Posts: 8
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Re: Clutch pedal to transmission linkage bracket question
I'm not sure what year the block is but it does have the 2 threaded inserts in the block for a bracket like the one 68orange posted. I think the 305 had that same bracket if memory serves me. However the location is a bit too forward to work. I will check later tonight when I get home, maybe snap a pic.
The summit racing bracket looks close to the right size but if I have to modify it, I might as well fabricate one for that price. Thanks for the replies. I will update later tonight or tomorrow. |
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#6 |
Senior Member
![]() Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,255
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Re: Clutch pedal to transmission linkage bracket question
Here are the Z-Bar stud bracket holes in my '67 block. [Center of shot].It's been sitting since 2004.
Not so sure what exact set-up was on the GMC V6s, but I would guess it would be closer to V8 than L6 stuff. The L6 Z-Bar is wider than the V8 Z-Bar. They are different animals.
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Every 25 years I like to rebuild that 292, whether it needs it or not. Last edited by '68OrangeSunshine; 05-31-2017 at 10:19 PM. |
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#7 |
Registered User
Join Date: May 2017
Location: Dallas, TX
Posts: 8
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Re: Clutch pedal to transmission linkage bracket question
My 292 casting code indicates its from 1963 to 1976. I may have modified the original engine-side bracket from the 305 V6 to fit the 250. Also, is the frame-side bracket fixed or movable? The orange block is the 250, blue one the 292.
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#8 | |
Senior Member
![]() Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,255
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Re: Clutch pedal to transmission linkage bracket question
Quote:
As they are riveted to the top of the frame, no. not generally moveable, but, if you drilled out the rivets and shot new holes for grade 8 hardware, anything is possible. I think you need to acquire a non-V6 frame Z-Bar bracket. I'll try to shoot a pic of one tomorrow. There's one still on my '67 K/10 Suburban, but it's been converted to automatic. Still need the bracket for a 292/SM465/T221 '72 K/5 project, so I am volunteering no hardware. The conventional L6 pivot stud bracket is about 6.5'' wide. V8s' Z-Bars were shorter, had a pivot stud on a bracket almost flush with the wider V8 block, except on 4x4 [K-types] a stud screwed right into the block. So you need to go on a junkyard hunt. You need: An L6 Upper Clutch Rod [good luck, they don't make 'em anymore, and the LMC repop is a joke -- might fit a Dodge, but not our trucks. My machinist fabbed one for me with heim joints in 2005. Now they retail them, but for big bucks] An L6 pivot stud bracket. [as illustrated] An L6 Z-Bar. [I''l have to pull the dimensions off my rigs tomorrow.] A flat, Chevy-style [not GMC] Z-Bar Frame Bracket. [Not hard to find, but grinding one off a frame can be a b!tch... Possibly a copy could be milled out of some stout 1.5'' angle iron.] A Lower Clutch Rod, [Easy enough] A Fork ''nut'' [Looks more like a wedge] There should be a lot of rustfree junkyards in your area, if it all hasn't been 'fished out' by high rollers from the rustbelt states. Good Hunting.
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Every 25 years I like to rebuild that 292, whether it needs it or not. |
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